1249047781149 has 16 divisors (see below), whose sum is σ = 1914987663872. Its totient is φ = 709362804528.

The previous prime is 1249047781133. The next prime is 1249047781159. The reversal of 1249047781149 is 9411877409421.

It is a happy number.

It is not a de Polignac number, because 1249047781149 - 2⁴ = 1249047781133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249047781159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182445859 + ... + 182452704.

It is an arithmetic number, because the mean of its divisors is an integer number (119686728992).

Almost surely, 2^{1249047781149} is an apocalyptic number.

It is an amenable number.

1249047781149 is a deficient number, since it is larger than the sum of its proper divisors (665939882723).

1249047781149 is a wasteful number, since it uses less digits than its factorization.

1249047781149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364898736.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 1249047781149 in words is "one trillion, two hundred forty-nine billion, forty-seven million, seven hundred eighty-one thousand, one hundred forty-nine".